/Engine/Source/Runtime/Engine/Classes/Animation/AnimBlueprintGeneratedClass.h
Struct type generated by the anim BP compiler. Used for sparse class data and mutable data area. Only really needed to hide the struct from the content browser (via IsAsset override)
class UAnimBlueprintGeneratedStruct : public [UScriptStruct](API\Runtime\CoreUObject\UObject\UScriptStruct)